Housed in the Mark V’s <R5> core, its core role is to terminate and route critical signals: 4–20 mA inputs/outputs, shaft voltage/current signals, IONET for STCA/TCDA boards, and COREBUS for QTBA/STCA boards. It also receives 24 VDC power from the TCPD board and includes a bypass relay to maintain COREBUS communication if power is lost. Physically, it is a long, narrow PCB with corner/edge drill holes for mounting, red-coated diodes, and identifying codes. It has diverse connectors — with the 6PL as an unused vestige — plus components like 20+ MOVs, a dozen jumpers, resistors, and relays. Unused COREBUS connectors require termination resistors, and details are in GE’s original technical materials.

Key Features
Revised Performance: Builds on the original DS200CTBAG1 with three product revisions, enhancing signal handling or reliability for aeroderivative and turbine control needs.

Critical Signal Termination: Centralizes routing of 4–20 mA I/O, shaft signals, IONET, and COREBUS, linking to key Mark V boards to maintain control loop integrity.

Redundant Power & Protection: Includes a bypass relay for COREBUS communication and over 20 MOVs + red diodes for voltage suppression/regulation, safeguarding sensitive circuits.

Configurable & Organized Connectivity: Features a dozen jumper switches for customization, clearly labeled factory-named connectors, and guidelines for unused parts, simplifying setup and maintenance.

Industrial-Grade Design: Conductive-ringed drill holes for secure mounting and durable components ensure stability in harsh turbine operating environments.